Compound for paving-bricks.



COATING OR PLASTIC.

UNITED STATES Patented April 25, 1905.

PATENT OFFICE.

THEODORE S. PIERCE, OF WALLA WALLA, WASHINGTON.

COMPOUND FOR PAVING -BRICKS.

SPECIFICATION forming part of Letters Patent No. 787,942, dated April 25, 1905.

Application filed August 26, 1903. Serial No. 170,815.

To all whom it may concern.-

Be it known that I, THEODORE S. PIERCE, a citizen of the United States, and a resident of Walla Walla, in the county of Walla Walla and State of Washington, have invented new and useful Improvements in a Compound for Paving-Bricks, of which the following is a full, clear, and exact description.

My invention relates to a certain novel and useful compound for the manufacture of building or paving bricks.

In carrying out my invention I have particularly in view as an object forming a compound from which bricks may be manufactured, such bricks when completed possessing the requisite and desired features of hardness,

V durability, and inexpensiveness.

cate of soda two and one-half pounds of it 1- c ar e and one pound of sulfuric acid. The

soda, litharge, and acid are a e 0 e water, and the solution thus formed is supplied to the mixture of slag and cement in such quantities as to form a plastic mass of desired consistency. The bricks may then be formed from the compound either by hand-press, steam-power, or any well-known brick-making machine, such bricks being dried in the air after the molding process has been completed.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The herein-described composition of matter, consisting of four parts of slag, one part of cement mixed together and then reduced to a plastic mass by the addition of a solution consisting of fifteen pounds of silicate of soda, two and one-half pounds litharge, one pound of sulfuric acid and forty gallons water in about the proportions specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THEODORE S. PIERCE. Witnesses:

LESTER S. WILSON,

FRANK HUNT.

33a, .92 z 7 Exammer.

106. COMPOSITIONS, 

